EP0358729B1 - Apparatus for mounting tyres - Google Patents

Apparatus for mounting tyres Download PDF

Info

Publication number
EP0358729B1
EP0358729B1 EP89900606A EP89900606A EP0358729B1 EP 0358729 B1 EP0358729 B1 EP 0358729B1 EP 89900606 A EP89900606 A EP 89900606A EP 89900606 A EP89900606 A EP 89900606A EP 0358729 B1 EP0358729 B1 EP 0358729B1
Authority
EP
European Patent Office
Prior art keywords
rim
motor
arms
pivoted
base plate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP89900606A
Other languages
German (de)
French (fr)
Other versions
EP0358729A1 (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Stahlgruber Otto Gruber GmbH and Co
Original Assignee
Stahlgruber Otto Gruber GmbH and Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Stahlgruber Otto Gruber GmbH and Co filed Critical Stahlgruber Otto Gruber GmbH and Co
Priority to AT89900606T priority Critical patent/ATE82552T1/en
Publication of EP0358729A1 publication Critical patent/EP0358729A1/en
Application granted granted Critical
Publication of EP0358729B1 publication Critical patent/EP0358729B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60CVEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C25/00Apparatus or tools adapted for mounting, removing or inspecting tyres
    • B60C25/01Apparatus or tools adapted for mounting, removing or inspecting tyres for removing tyres from or mounting tyres on wheels
    • B60C25/05Machines
    • B60C25/132Machines for removing and mounting tyres
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60CVEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C25/00Apparatus or tools adapted for mounting, removing or inspecting tyres
    • B60C25/01Apparatus or tools adapted for mounting, removing or inspecting tyres for removing tyres from or mounting tyres on wheels
    • B60C25/05Machines
    • B60C25/132Machines for removing and mounting tyres
    • B60C25/135Machines for removing and mounting tyres having a tyre support or a tool, movable along wheel axis
    • B60C25/138Machines for removing and mounting tyres having a tyre support or a tool, movable along wheel axis with rotary motion of tool or tyre support

Definitions

  • the invention relates to a device for mounting and removing a tire on or from a wheel rim of the type specified in the preamble of claim 1.
  • a drive motor arranged in the base causes the vehicle wheel locked on the support plate to rotate, so that the entire two bead edges are detached from the rim flanges. Furthermore, this mounting device has a device for covering the pressed-off bead edges over the rim flange, the lifting finger of which is coupled to a central rod guided in the stand.
  • a multi-stage V-belt transmission is provided between the drive motor and the rotating sleeve mounted in the stand, which is firmly connected to the wheel rim via the locking center.
  • the wheel rim is locked on the one hand by a nut which can be turned by hand and on the other hand by spring-loaded locking bolts which are mounted on the underside of the support plate.
  • a similar mounting device is known from US-A-4 047 553, in which one or two conical push-off rollers are arranged at the end of two mutually vertically adjustable arms. These arms are guided with their rear ends in a vertical stand that can be adjusted in relation to one another by means of a motor.
  • the stand is located at the rear end of a base, which carries a vertical support column in its front part with mounting and tensioning elements for fixing a vehicle wheel.
  • the object of the invention is to provide a generic device for assembling and disassembling pneumatic vehicle tires which, with simplified operation, ensures reliable locking even of heavy vehicle wheels and manages with compressed air as the only energy source.
  • the design of the locking elements for the wheel rim in the form of several spreader arms ensures a twist-proof fixation while simultaneously centering the wheel rim on the support plate of the column.
  • the slowly rotating pneumatic motor can apply high torques with small dimensions, so that even heavy pneumatic tires or truck wheels can be fitted.
  • the arrangement of friction clutches in the drive train from the pneumatic motor to the rotatable support column or to the spreading arms ensures overload protection and an automatic transition between the spreading phase of the arms and the twisting phase of the clamped vehicle wheel.
  • two transverse arms are fastened to bearing bushes rotatably about the central axis of the stand on the stand of the push-off device.
  • Piston-cylinder units are arranged between these horizontally rigid arms and the swivel levers carrying the push-off rollers, the actuation of which causes the swivel levers to perform a swivel movement about their respective articulation axis after the adjustment of the cross arms.
  • the device 10 shows a device 10 for mounting and removing a tire on or from a rim in a side view.
  • the device 10 has a device 12 for fixing or clamping a wheel rim, which is driven by a motor 14.
  • the motor 14 also causes arms 16 of the clamping device 12 to pivot.
  • a device 18 is provided for pulling or pulling the bead edges of the tire from or onto the rim.
  • the bead edges of the tire are pressed into the rim well by means of a device 20.
  • the devices 12, 14, 18 and 20 are arranged on a frame 22.
  • the device 12 is arranged with its central axis 24 inclined to the vertical, which facilitates the handling of the device.
  • the motor 14 for driving the clamping device 12 is a pneumatic motor, which is explained in more detail with reference to FIGS. 4 to 15.
  • the device 20 for pressing the bead edges of a tire into a rim well is described in more detail with reference to FIGS. 17 and 18.
  • a column 26 is attached to the frame 22 and has an arm 28 which is horizontal in the position shown at its upper end.
  • a pivotable arm 30 is mounted on the arm 28 and has an element 32 for pulling off at its lower free end. the bead edges of a wheel rim.
  • the element 32 which is preferably made of plastic, rests on the rim flange of a wheel rim and either pushes the bead rim inwards into the rim bed via the rim flange or pulls a bead rim out of the rim bed over the rim flange in order to remove a tire from a wheel rim to dismantle. Since the element 32 is supported on the rim flange, the arm 30 can be designed to be relatively freely movable.
  • the pneumatic motor 50 consists of a stator housing 52 with two housing halves 54, 56.
  • a rotor 58 is arranged within the stator housing 52.
  • the rotor 58 forms a cylinder block in which seven cylinder bores 60, 62, 64, 66, 68, 70 and 72 are formed so as to be distributed radially uniformly in the cylinder block 58.
  • a compressed air supply or discharge line 74, 76, 78, 80, 82, 84, 86 is assigned to each cylinder 60 to 72.
  • the openings of the lines 74 to 86 lie on a circle 88.
  • a piston 90 to 102 is displaceably guided in each cylinder 60 to 72.
  • the pistons 90 to 102 are sealed by means of ring seals 104.
  • rollers 106, 108, 110, 112, 114, 116, 118 are rotatably mounted.
  • the rollers 106 to 118 run on a cam ring 120 which is formed in the interior of the stator housing 52.
  • the cam ring 120 has twenty cam mountains 122 and twenty cam valleys 124.
  • An output shaft 126 is fastened coaxially to the cylinder block 58 and is mounted in the stator housing 52 via bearings 128 and 130.
  • the top of the cylinder block 58 slides on the Underside of a control device 132, via which a frontal supply and disposal of the cylinders 60 to 72 takes place with compressed air.
  • the control device 132 has a compressed air supply line 134 and a compressed air discharge line 136. As will be explained below, both lines can be reversed, ie compressed air can be supplied via line 136 and compressed air can be discharged via line 134, which is associated with a reversal of the direction of rotation of the rotor 58.
  • compressed air is introduced into the control device 132 via both the line 134 and 136, all the pistons 90 to 102 of the cylinders 60 to 72 are supplied with compressed air and the rotor is blocked in the stator, as a result of which the pneumatic motor 50 comes to a standstill and locks becomes.
  • An annular groove 140 is formed in the upper stator housing half 54, in which the control device 132 is inserted. After the control device 132 has been inserted into the annular groove 140, an annular groove 135, into which a compressed air supply opening 134 opens, and a radially further outward annular groove 137 into which a compressed air outlet opening 136 opens.
  • the control device 132 consists of a ring 142 which is formed on the side facing the cylinder block 58 with elongated holes 144 and 146, respectively. From the elongated holes 144, vertical through channels 148 extend radially inwards through the ring 142. From the elongated holes 146, through channels 150 extend upward through the ring at the radially outer end.
  • Compressed air is supplied to the supply lines 106 to 118 of the piston-cylinder units 60; via the elongated holes 144 and the through-channels 148; 90 to 72; 102 supplied when they are connected to the through lines 148.
  • compressed air is conducted via the through opening 150 and the elongated holes 146 into the output line 136 by the piston-cylinder units which communicate with the through lines 150 stay in contact.
  • each piston cylinder unit 60, 90 to 72, 102 with the corresponding line 106 to 118 is alternately connected to the air supply line 134 or the air outlet line 136 via the frontal supply device 132.
  • the pistons 60, 62, 64 are supplied with compressed air and their rollers 106, 108, 110 exert pressure on the flanks of the cams 122, 124 so that the rotor 58 counterclockwise on the cam ring 120 expires.
  • the piston 96 is in its fully extended position, i.e. the roller 112 is at the center of a cam valley 124.
  • the piston 96 is reversed, i.e.
  • the compressed air from the cylinder 66 is released so that the piston 96 is pushed into the cylinder and the roller 112 does not exert any pressure on the cam flank.
  • Compressed air is also exported in cylinders 68, 70 and 72, since rollers 14, 116, 118 of pistons 98, 100, 102 run on cam flanks and the pistons are displaced into the interior of the cylinders.
  • the torque generated by all active pistons provides a drive sufficient to perform a full 360 ° rotation of the rotor 58 and to provide sufficient torque in each phase of the movement to rotate a tire during assembly or disassembly.
  • the pistons that are in the active phase i.e. the rollers of which act under pressure on the flanks of the cams falling in the direction of rotation of the rotor are supplied with compressed air via the compressed air lines, while compressed air is discharged from the other cylinders when the pistons are moved radially inwards.
  • Each spreader arm has a toothed segment 212 which meshes with a thread 214 of a worm 216 which is arranged on the output shaft 126 of the pneumatic motor 50.
  • the teeth of segment 212 of spreader arm 202 are offset from the teeth of spreader arm 204 by a quarter of the pitch of thread 214 of worm 216.
  • the teeth of the segment of the spreader arm 204 are in turn offset by a quarter pitch compared to the teeth of the segment on the spreader arm 206 and which in turn are offset by a quarter pitch of the thread 214 of the worm 216 relative to the teeth on the spreader arm 208, which ensures that when rotating the Screw 216 each spreading arm 202 to 208 performs the same pivoting movement outwards or inwards.
  • a clutch disc 218 has a friction lining 221 on the underside, via which frictional engagement with the housing 51 of the pneumatic motor 50 is effected.
  • the coupling disc 218 is coupled pneumatically to the housing 51.
  • the clutch disc 218 is guided in a housing ring 223 arranged on the housing 51.
  • Screws 219 are attached to the top of the clutch disc 218 and are guided through bores 225 in the bearing plate 200.
  • Disc springs 222 which are arranged around the screws 219, are supported on the upper side of the bearing plate 200.
  • the bearing plate 200 is held stationary via the screws 219 when the clutch disc 218 is coupled to the housing 51 by friction. In this position of the bearing plate 200, the spreading arms 202 to 208 can be pivoted via the worm 216 driven by the output shaft 126 of the pneumatic motor 50.
  • the pneumatic pressure is applied to the Clutch disc 218 ends so that it rises under the action of the springs 222 and with its upper side, on which a friction lining 227 is arranged, comes into contact with the underside of a ring 217 which is integrally formed on the worm 216.
  • the bearing plate 200 is carried by the screws 225 when the clutch disc 218 rotates together with the worm 216, while the spreading arms 202 to 208 maintain their set position. This rotates a wheel rim clamped over the spreading arms and the assembly or disassembly of a tire on or from a wheel rim can be carried out.
  • the pneumatic motor 50 is stopped and stopped by supplying both compressed air supply and discharge with compressed air, and by re-coupling the clutch disc 218 to the housing 51 of the motor 50 and reversely supplying the compressed air motor 50, the screw 216 turns to the left causes what is associated with a pivoting of the spreading arms 202 to 208, which in turn release the clamped wheel rim.
  • clamping hooks 226 are arranged, by means of which wheel rims can be gripped on the rim flange from the outside and can be clamped in by pivoting the spreading arms 202 to 208.
  • a support plate 228 arranged on the upper side of the device 12 can be removed, so that wheel rims with the above centering piece can also be fixed in the device 12.
  • the device 12 for fixing the wheel rims does not require an additional power unit, such as piston-cylinder units, for actuating clamping jaws, but is instead operated via the pneumatic one Motor operated.
  • the device 12 is preferably arranged inclined to the vertical, so that a comfortable and fatigue-free work is possible.
  • the push-off device 20 has two arms 250 and 252, which are mounted on a vertically arranged column 258 via bushings 254 and 256, respectively.
  • the column 258 is preferably hexagonal in cross section so that the arms 250 and 252 on the column 258 cannot be rotated.
  • a coil spring 250 is arranged on the column 258, by means of which the arms are pressed apart.
  • a cylinder 262 is articulated on the arm 250 and a piston 264 on the arm 252.
  • the articulation of the piston cylinder unit 262, 264 is carried out at the shortest distance from the column 258, so that no tilting moments occur on the bushes 254, 256 during the actuation of the piston cylinder unit 262, 264.
  • the cylinder 262 is supplied with compressed air via a line 266, whereby the piston 264 is pushed into the cylinder 262 and the distance between the arms 250, 252 is reduced.
  • a swivel lever 268 is articulated on the arm 250 and a swivel lever 270 is articulated on the arm 252.
  • a conical roller 272 is mounted on the front free end of the pivot lever 268 and a conical roller 274 is mounted on the front end of the pivot lever 270.
  • the rollers 272 and 274 are placed on the flanks of the tire in order to press the tire off a wheel rim in the immediate vicinity of the rim flange.
  • the required axial push-off force is applied to the pivot levers 268, 270 via piston cylinder units 276 and 278, which are fastened to the arms 250 and 252, respectively upset.
  • the required compressed air is fed into the piston cylinder units 276, 278 via lines 280 and 282, respectively.
  • the swivel levers 268, 270 are returned to their starting position after a push-off operation when the piston-cylinder units 276, 278 are retracted via tension springs 284 and 286, respectively.
  • the piston-cylinder units 276 and 278 can carry out different paths and thus different pivoting angles of the levers 268, 270. which allows adaptation to rim shoulder widths of different widths. Stops 288 and 290 limit the maximum swivel paths of the swivel levers 268 and 270, respectively.
  • the device for pressing a tire off a wheel rim with the column 258 can be pivoted through an angle ⁇ , so that on the one hand an unimpeded fitting of a tire to be fitted can take place and on the other hand different tire diameters are taken into account can.
  • the arms 250 and 252 slide with their bushings 254, 256 in the vertical direction on the column 258, actuated via the piston-cylinder unit 262, 264, in order to be adjusted to the width of the tire to be pushed off.
  • the diameter is taken into account at the same time.
  • the conical rollers 272, 274 are seated on the tire flanks.
  • pressure is exerted on the piston cylinder units 276, 278, whereby the bead edges are pressed off the rim shoulders into the rim well. By turning the tire, the force required to push the bead edges can be greatly reduced.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Tyre Moulding (AREA)
  • Tires In General (AREA)
  • Automobile Manufacture Line, Endless Track Vehicle, Trailer (AREA)
  • Diaphragms And Bellows (AREA)

Abstract

PCT No. PCT/EP88/01193 Sec. 371 Date Sep. 14, 1989 Sec. 102(e) Date Sep. 14, 1989 PCT Filed Dec. 22, 1988 PCT Pub. No. WO89/06604 PCT Pub. Date Jul. 27, 1989.An apparatus for mounting a tire on a rim and removing it therefrom has a device for rotating the rim, which is embodied as a pneumatic motor having a rotor and a stator with radially arranged piston/cylinder units and cams disposed on a circle, a device for firmly holding the rim of self-centering arms that are pivotable via the pneumatic motor, a device for forcing the bead edges of the tire into the rim bed that comprises rollers acting simultaneously on both beads, and a device for pulling the bead edges from or onto the rim, with an element for bracing against the wheel flange. Via the hydraulic motor that drives the arms of the holding or chucking device, a rim is firmly held and once it is firmly clamped is rotated via the motor. The apparatus is operated completely pneumatically.

Description

Die Erfindung betrifft eine Vorrichtung zum Montieren und Demontieren eines Reifens auf eine bzw. von einer Radfelge der im Oberbegriff des Patentanspruchs 1 angegebenen Gattung.The invention relates to a device for mounting and removing a tire on or from a wheel rim of the type specified in the preamble of claim 1.

Aus der US-A-3 086 578 ist eine derartige Montiervorrichtung für die Luftreifen von Kraftfahrzeugen bekannt, bei welcher auf einem kastenförmigen Sockel im vorderen Teil eine Tragsäule mit einem Auflageteller und Arretiermitteln zur Auflage und Fixierung einer Radfelge angeordnet ist. Im hinteren Teil dieses Sockels ist ein Ständer befestigt, der Vertikalführungen und einen Verstellzylinder für zwei horizontal vorstehende Arme besitzt. Am freien Vorderende jedes Armes ist eine profilierte Abdrückrolle montiert. Durch Betätigen des Verstellantriebs werden die beiden Abdrückrollen an den Bereich der Wulstränder eines zuvor auf dem Ständer arretierten Fahrzeugrades herangeführt und in das Bett der Radfelge hineingedrückt. Ein im Sockel angeordneter Antriebsmotor bewirkt eine Verdrehung des auf dem Auflageteller arretierten Fahrzeugrads, so daß die gesamten beiden Wulstränder von den Felgenhörnern gelöst werden. Ferner weist diese Montiervorrichtung eine Einrichtung zum Überziehen der abgedrückten Wulstränder über das Felgenhorn auf, deren Aushebefinger mit einer im Ständer geführten zentralen Stange gekoppelt ist. Zwischen dem Antriebsmotor und der im Ständer gelagerten Drehhülse, die über die Arretiermitte mit der Radfelge fest verbunden wird, ist ein mehrstufiges Keilriemengetriebe vorgesehen.From US-A-3 086 578 such a mounting device for the pneumatic tires of motor vehicles is known, in which a support column with a support plate and locking means for supporting and fixing a wheel rim is arranged on a box-shaped base in the front part. In the rear part of this base, a stand is attached, which has vertical guides and an adjustment cylinder for two horizontally projecting arms. A profiled pressure roller is mounted on the free front end of each arm. By actuating the adjustment drive, the two pressing rollers are brought to the area of the bead edges of a vehicle wheel previously locked on the stand and pressed into the bed of the wheel rim. A drive motor arranged in the base causes the vehicle wheel locked on the support plate to rotate, so that the entire two bead edges are detached from the rim flanges. Furthermore, this mounting device has a device for covering the pressed-off bead edges over the rim flange, the lifting finger of which is coupled to a central rod guided in the stand. A multi-stage V-belt transmission is provided between the drive motor and the rotating sleeve mounted in the stand, which is firmly connected to the wheel rim via the locking center.

Die Arretierung der Radfelge erfolgt einmal durch eine von Hand verdrehbare Mutter und zum anderen durch federbelastete Arretierbolzen, die an der Unterseite der Auflageplatte montiert sind.The wheel rim is locked on the one hand by a nut which can be turned by hand and on the other hand by spring-loaded locking bolts which are mounted on the underside of the support plate.

Aus der US-A-4 047 553 ist eine ähnliche Montiereinrichtung bekannt, bei welcher ein oder zwei konische Abdrückrollen am Ende von zwei gegeneinander vertikal verstellbaren Armen angeordnet sind. Diese Arme sind mit ihren rückwärtigen Enden in einem vertikalen Ständer gegeneinander motorisch verstellbar geführt. Der Ständer befindet sich am hinteren Ende eines Sockels, der in seinem Vorderteil eine vertikale Tragsäule mit Halterungs- und Spannelementen für die Fixierung eines Fahrzeugrades trägt.A similar mounting device is known from US-A-4 047 553, in which one or two conical push-off rollers are arranged at the end of two mutually vertically adjustable arms. These arms are guided with their rear ends in a vertical stand that can be adjusted in relation to one another by means of a motor. The stand is located at the rear end of a base, which carries a vertical support column in its front part with mounting and tensioning elements for fixing a vehicle wheel.

Bei den bekannten Montiervorrichtungen sind mehrere unterschiedliche Antriebsaggregate, wie Elektromotoren und pneumatische Kolbenzylindereinheiten, sowie ein Untersetzungsgetriebe zwischen dem Elektromotor und dem Auflageteller für das Fahrzeugrad erforderlich. Darüber hinaus können sich Probleme bei der manuell durchgeführten Arretierung der ggf. schweren Fahrzeugräder auf dem Auflageteller ergeben.In the known mounting devices, several different drive units, such as electric motors and pneumatic piston cylinder units, and a reduction gear between the electric motor and the support plate for the vehicle wheel are required. In addition, problems can arise when manually locking the possibly heavy vehicle wheels on the support plate.

Aufgabe der Erfindung ist es, eine gattungsgemäße Vorrichtung zum Montieren und Demontieren von Kraftfahrzeug-Luftreifen zu schaffen, die bei vereinfachter Bedienung eine zuverlässige Arretierung auch schwerer Fahrzeugräder gewährleistet und mit Druckluft als einzigem Energieträger auskommt.The object of the invention is to provide a generic device for assembling and disassembling pneumatic vehicle tires which, with simplified operation, ensures reliable locking even of heavy vehicle wheels and manages with compressed air as the only energy source.

Diese Aufgabe wird durch die Merkmale des Patentanspruchs 1 gelöst.This object is achieved by the features of patent claim 1.

Die Ausbildung der Arretierelemente für die Radfelge in Form von mehreren Spreizarmen gewährleistet eine verdrehsichere Fixierung bei gleichzeitiger genauer Zentrierung der Radfelge auf dem Auflageteller der Säule. Durch die Kopplung des Antriebsmotors einmal mit dem Drehteller und zum anderen mit den Spreizarmen wird erreicht, daß nach dem Auflegen eines Fahrzeugrades auf den Teller durch Starten des Motors in einer ersten Phase die Arretierung und Zentrierung der Radfelge erfolgt und in einer automatisch sich anschließenden zweiten Phase die arretierte Radfelge in Drehung versetzt wird, um durch eine anschließende Zustellbewegung der beiden Arme der Abdrückeinrichtung die Radwülste vollständig vom Felgenhorn zu lösen. Dabei erfordern der pneumatische Radialkolbenmotor und auch die Stellzylinder der Abdrückeinrichtung lediglich Druckluft als einzigem Energieträger. Von dem langsam drehenden pneumatischen Motor können hohe Drehmomente bei geringen Abmessungen aufgebracht werden, so daß auch schwere Luftreifen bzw. LKW-Räder montiert werden können. Durch die Anordnung von Reibungskupplungen im Antriebszug vom pneumatischen Motor zur drehbaren Tragsäule bzw. zu den Spreizarmen wird eine Überlastsicherung und ein automatischer Übergang zwischen der Spreizphase der Arme und der Verdrehphase des aufgespannten Fahrzeugrades erzielt.The design of the locking elements for the wheel rim in the form of several spreader arms ensures a twist-proof fixation while simultaneously centering the wheel rim on the support plate of the column. By coupling the drive motor with the turntable and the spreading arms, it is achieved that after placing a vehicle wheel on the plate by starting the engine, the wheel rim is locked and centered in a first phase and in an automatically following second phase the locked wheel rim is rotated in order to completely detach the wheel beads from the rim flange by a subsequent infeed movement of the two arms of the push-off device. The pneumatic radial piston motor and the actuating cylinders of the push-off device only require compressed air as the only energy source. The slowly rotating pneumatic motor can apply high torques with small dimensions, so that even heavy pneumatic tires or truck wheels can be fitted. The arrangement of friction clutches in the drive train from the pneumatic motor to the rotatable support column or to the spreading arms ensures overload protection and an automatic transition between the spreading phase of the arms and the twisting phase of the clamped vehicle wheel.

Gemäß einer bevorzugten Ausführung der Erfindung sind am Ständer der Abdrückeinrichtung zwei Querarme an Lagerbuchsen um die Mittelachse des Ständers verdrehbar befestigt. Zwischen diesen horizontal starren Armen und den die Abdrückrollen tragenden Schwenkhebeln sind Kolbenzylindereinheiten angeordnet, durch deren Betätigung die Schwenkhebel nach der Einstellung der Querarme eine Schwenkbewegung um ihre jeweilige Anlenkachse ausführen. Durch diese Ausgestaltung wird der Angriff der an den freien Enden der Schwenkhebel gelagerten Andrückrollen an den druckempfindlichen Seitenwandungen des jeweiligen Reifens verbessert.According to a preferred embodiment of the invention, two transverse arms are fastened to bearing bushes rotatably about the central axis of the stand on the stand of the push-off device. Piston-cylinder units are arranged between these horizontally rigid arms and the swivel levers carrying the push-off rollers, the actuation of which causes the swivel levers to perform a swivel movement about their respective articulation axis after the adjustment of the cross arms. With this configuration, the attack on the free ends of the Swivel lever-mounted pressure rollers on the pressure-sensitive sidewalls of the respective tire improved.

Weitere zweckmäßige Ausgestaltungen der Erfindung sind Gegenstand der Unteransprüche.Further expedient refinements of the invention are the subject of the dependent claims.

Im folgenden wird ein Ausführungsbeispiel der Erfindung anhand der Zeichnung näher erläutert. Es zeigen:

  • Fig. 1: eine Montiervorrichtung für einen Luftreifen auf eine bzw. von einer Kfz-Felge in Seitenansicht,
  • Fig. 2 die Vorrichtung nach Fig. 1 in Draufsicht,
  • Fig. 3 die Vorrichtung nach Fig. 2 in Vorderansicht
  • Fig. 4 einen Längsschnitt durch einen pneumatischen Motor,
  • Fig. 5 einen Schnitt längs der Linie V-V von Fig. 4,
  • Fig. 6 eine Ansicht auf die Oberseite eines Zylinderblocks,
  • Fig. 7 eine Ansicht auf die Unterseite des Zylinderblocks nach Fig. 6,
  • Fig. 8 einen Schnitt längs der Linie VIII-VIII von Fig. 6,
  • Fig. 9 eine Draufsicht auf die obere Hälfte des Statorgehäuses,
  • Fig. 10 einen Schnitt längs der Linie X-X von Fig. 9 in vergrößertem Maßstab,
  • Fig. 11 einen Schnitt längs der Linie XI-XI von Fig. 9,
  • Fig. 12 eine Ansicht auf die Unterseite der oberen Hälfte des Statorgehäuses nach Fig. 9,
  • Fig. 13 einen Schnitt durch eine Steuereinheit,
  • Fig. 14 eine Ansicht gemäß Pfeil XIV von Fig. 13,
  • Fig. 15 eine Ansicht gemäß Pfeil XV von Fig. 13,
  • Fig. 16 eine Einrichtung zum Festlegen einer Radfelge in Seitenansicht, teilweise geschnitten,
  • Fig. 17 eine Einrichtung zum Abdrücken eines Reifens von einer Radfelge in Seitenansicht, und
  • Fig.18 die Einrichtung nach Fig. 17 in Draufsicht.
An exemplary embodiment of the invention is explained in more detail below with reference to the drawing. Show it:
  • 1: a mounting device for a pneumatic tire on or from a motor vehicle rim in side view,
  • 2 shows the device according to FIG. 1 in plan view,
  • Fig. 3 shows the device of FIG. 2 in front view
  • 4 shows a longitudinal section through a pneumatic motor,
  • 5 shows a section along the line VV of FIG. 4,
  • 6 is a view of the top of a cylinder block,
  • 7 is a view of the underside of the cylinder block of FIG. 6,
  • 8 shows a section along the line VIII-VIII of FIG. 6,
  • 9 is a plan view of the upper half of the stator housing,
  • 10 shows a section along the line XX of FIG. 9 on an enlarged scale,
  • 11 shows a section along the line XI-XI of FIG. 9,
  • 12 is a view of the underside of the upper half of the stator housing according to FIG. 9,
  • 13 shows a section through a control unit,
  • 14 is a view according to arrow XIV of FIG. 13,
  • 15 is a view according to arrow XV of FIG. 13,
  • 16 shows a device for fixing a wheel rim in a side view, partly in section,
  • 17 shows a device for pushing a tire off a wheel rim in a side view, and
  • 18 shows the device according to FIG. 17 in plan view.

Fig. 1 zeigt eine Vorrichtung 10 zur Montage und Demontage eines Reifens auf eine bzw. von einer Felge in Seitenansicht. Die Vorrichtung 10 weist eine Einrichtung 12 zum Festlegen oder Aufspannen einer Radfelge auf, die über einen Motor 14 angetrieben wird. Durch den Motor 14 erfolgt darüberhinaus ein Verschwenken von Armen 16 der Aufspanneinrichtung 12. Ferner ist eine Einrichtung 18 zum Abziehen bzw. Aufziehen der Wulstränder des Reifens von der bzw. auf die Felge vorgesehen. Mittels einer Einrichtung 20 erfolgt ein Abdrücken der Wulstränder des Reifens in das Felgenbett. Die Einrichtungen 12, 14, 18 und 20 sind auf einem Rahmen 22 angeordnet. Wie aus Fig. 1 zu ersehen ist, ist die Einrichtung 12 mit ihrer Mittelachse 24 geneigt gegenüber der Vertikalen angeordnet, was die Handhabung der Vorrichtung erleichtert. Der Motor 14 zum Antrieb der Aufspanneinrichtung 12 ist ein pneumatischer Motor, der anhand der Fig. 4 bis 15 näher erläutert wird. Die Einrichtung 20 zum Abdrücken der Wulstränder eines Reifens in ein Felgenbett wird anhand der Fig. 17 und 18 näher beschrieben.1 shows a device 10 for mounting and removing a tire on or from a rim in a side view. The device 10 has a device 12 for fixing or clamping a wheel rim, which is driven by a motor 14. The motor 14 also causes arms 16 of the clamping device 12 to pivot. Furthermore, a device 18 is provided for pulling or pulling the bead edges of the tire from or onto the rim. The bead edges of the tire are pressed into the rim well by means of a device 20. The devices 12, 14, 18 and 20 are arranged on a frame 22. As can be seen from Fig. 1, the device 12 is arranged with its central axis 24 inclined to the vertical, which facilitates the handling of the device. The motor 14 for driving the clamping device 12 is a pneumatic motor, which is explained in more detail with reference to FIGS. 4 to 15. The device 20 for pressing the bead edges of a tire into a rim well is described in more detail with reference to FIGS. 17 and 18.

Auf dem Rahmen 22 ist eine Säule 26 befestigt, die an ihrem oberen Ende einen in der gezeigten Stellung waagrechten Arm 28 aufweist. An dem Arm 28 ist ein verschwenkbarer Arm 30 gelagert, der an seinem unteren freien Ende ein Element 32 zum Abziehen. der Wulstränder von einer Radfelge aufweist. Das Element 32, das vorzugsweise aus Kunststoff besteht, stützt sich auf dem Felgenhorn einer Radfelge auf und schiebt entweder den Wulstrand über das Felgenhorn nach innen in das Felgenbett oder zieht einen Wulstrand aus dem Felgenbett über das Felgenhorn nach außen, um einen Reifen von einen Radfelge zu demontieren. Da sich das Element 32 auf dem Felgenhorn abstützt, kann der Arm 30 relativ frei beweglich ausgebildet sein.A column 26 is attached to the frame 22 and has an arm 28 which is horizontal in the position shown at its upper end. A pivotable arm 30 is mounted on the arm 28 and has an element 32 for pulling off at its lower free end. the bead edges of a wheel rim. The element 32, which is preferably made of plastic, rests on the rim flange of a wheel rim and either pushes the bead rim inwards into the rim bed via the rim flange or pulls a bead rim out of the rim bed over the rim flange in order to remove a tire from a wheel rim to dismantle. Since the element 32 is supported on the rim flange, the arm 30 can be designed to be relatively freely movable.

Fig. 4 zeigt einen Längsschnitt durch einen pneumatischen Motor 50. Der pneumatische Motor 50 besteht aus einem Statorgehäuse 52 mit zwei Gehäusehälften 54, 56. Innerhalb des Statorgehäuses 52 ist ein Rotor 58 angeordnet. Der Rotor 58 bildet einen Zylinderblock, in welchem sieben Zylinderbohrungen 60, 62, 64, 66, 68, 70 und 72 radial gleichmäßig in dem Zylinderblock 58 verteilt ausgebildet sind. Jedem Zylinder 60 bis 72 ist eine Druckluftzu- bzw. abfuhrleitung 74, 76, 78, 80, 82, 84, 86 zugeordnet. Die Öffnungen der Leitungen 74 bis 86 liegen auf einem Kreis 88. In jedem Zylinder 60 bis 72 ist ein Kolben 90 bis 102 verschiebbar geführt. Die Abdichtung der Kolben 90 bis 102 erfolgt über Ringdichtungen 104. Am radial äußeren Ende der Kolben 90 bis 102 sind Rollen 106, 108, 110, 112, 114, 116, 118 drehbar gelagert. Die Rollen 106 bis 118 laufen auf einem Nockenkranz 120, der im Inneren des Statorgehäuses 52 ausgebildet ist. Der Nockenkranz 120 weist zwanzig Nockenberge 122 und zwanzig Nockentäler 124 auf. Koaxial an dem Zylinderblock 58 ist eine Abtriebswelle 126 befestigt, die in dem Statorgehäuse 52 über Lager 128 und 130 gelagert ist. Die Oberseite des Zylinderblockes 58 gleitet an der Unterseite einer Steuereinrichtung 132, über welche eine frontale Ver- und Entsorgung der Zylinder 60 bis 72 mit Druckluft erfolgt. Die Steuereinrichtung 132 weist eine Druckluftzufuhrleitung 134 und eine Druckluftabfuhrleitung 136 auf. Wie nachstehend erläutert wird, können beide Leitungen umgekehrt werden, d.h. über die Leitung 136 kann Druckluft zugeleitet und über die Leitung 134 Druckluft abgeleitet werden, was mit einer Drehrichtungsumkehr des Rotors 58 verbunden ist. Wenn sowohl über die Leitung 134 als auch 136 Druckluft in die Steuereinrichtung 132 eingeleitet wird, werden sämtliche Kolben 90 bis 102 der Zylinder 60 bis 72 mit Druckluft versorgt und der Rotor wird in dem Stator blockiert, wodurch der pneumatische Motor 50 zum Stillstand gelangt und arretiert wird.4 shows a longitudinal section through a pneumatic motor 50. The pneumatic motor 50 consists of a stator housing 52 with two housing halves 54, 56. A rotor 58 is arranged within the stator housing 52. The rotor 58 forms a cylinder block in which seven cylinder bores 60, 62, 64, 66, 68, 70 and 72 are formed so as to be distributed radially uniformly in the cylinder block 58. A compressed air supply or discharge line 74, 76, 78, 80, 82, 84, 86 is assigned to each cylinder 60 to 72. The openings of the lines 74 to 86 lie on a circle 88. A piston 90 to 102 is displaceably guided in each cylinder 60 to 72. The pistons 90 to 102 are sealed by means of ring seals 104. At the radially outer end of the pistons 90 to 102, rollers 106, 108, 110, 112, 114, 116, 118 are rotatably mounted. The rollers 106 to 118 run on a cam ring 120 which is formed in the interior of the stator housing 52. The cam ring 120 has twenty cam mountains 122 and twenty cam valleys 124. An output shaft 126 is fastened coaxially to the cylinder block 58 and is mounted in the stator housing 52 via bearings 128 and 130. The top of the cylinder block 58 slides on the Underside of a control device 132, via which a frontal supply and disposal of the cylinders 60 to 72 takes place with compressed air. The control device 132 has a compressed air supply line 134 and a compressed air discharge line 136. As will be explained below, both lines can be reversed, ie compressed air can be supplied via line 136 and compressed air can be discharged via line 134, which is associated with a reversal of the direction of rotation of the rotor 58. When compressed air is introduced into the control device 132 via both the line 134 and 136, all the pistons 90 to 102 of the cylinders 60 to 72 are supplied with compressed air and the rotor is blocked in the stator, as a result of which the pneumatic motor 50 comes to a standstill and locks becomes.

In der oberen Statorgehäusehälfte 54 ist eine Ringnut 140 ausgebildet, in welcher die Steuereinrichtung 132 eingesetzt ist. Nach Einsetzen der Steuereinrichtung 132 in die Ringnut 140 wird eine Ringnut 135, in welche eine Druckluftzuleitungsöffnung 134 mündet, und eine radial weiter außen liegende Ringnut 137 abgegrenzt, in welche eine Druckluftauslaßöffnung 136 mündet. Die Steuereinrichtung 132 besteht aus einem Ring 142, der an der auf der dem Zylinderblock 58 zugekehrten Seite mit Langlöchern 144 bzw. 146 ausgebildet ist. Von den Langlöchern 144 verlaufen radial innen senkrechte Durchgangskanäle 148 durch den Ring 142 nach oben. Von den Langlöchern 146 verlaufen Durchgangskanäle 150 am radial äußeren Ende nach oben durch den Ring. Über die Langlöcher 144 und die Durchgangskanäle 148 wird Druckluft den Zufuhrleitungen 106 bis 118 der Kolbenzylindereinheiten 60; 90 bis 72; 102 zugeführt, wenn diese mit den Durchgangsleitungen 148 in Verbindung stehen. Entsprechend wird Druckluft über die Durchgangsöffnung 150 und die Langlöcher 146 in die Ausgangsleitung 136 geleitet von den Kolbenzylindereinheiten, die mit den Durchgangsleitungen 150 in Verbindung stehen.An annular groove 140 is formed in the upper stator housing half 54, in which the control device 132 is inserted. After the control device 132 has been inserted into the annular groove 140, an annular groove 135, into which a compressed air supply opening 134 opens, and a radially further outward annular groove 137 into which a compressed air outlet opening 136 opens. The control device 132 consists of a ring 142 which is formed on the side facing the cylinder block 58 with elongated holes 144 and 146, respectively. From the elongated holes 144, vertical through channels 148 extend radially inwards through the ring 142. From the elongated holes 146, through channels 150 extend upward through the ring at the radially outer end. Compressed air is supplied to the supply lines 106 to 118 of the piston-cylinder units 60; via the elongated holes 144 and the through-channels 148; 90 to 72; 102 supplied when they are connected to the through lines 148. Correspondingly, compressed air is conducted via the through opening 150 and the elongated holes 146 into the output line 136 by the piston-cylinder units which communicate with the through lines 150 stay in contact.

Während der Rotation des pneumatischen Motors 50 ist jede Kolbenzylindereinheit 60, 90 bis 72, 102 mit der entsprechenden Leitung 106 bis 118 abwechselnd über die frontale Versorgungseinrichtung 132 mit der Luftzufuhrleitung 134 oder der Luftauslaßleitung 136 verbunden. Aus Fig. 5 ist zu ersehen, daß die Kolben 60, 62, 64 mit Druckluft gespeist werden und ihre Rollen 106, 108, 110 an den Flanken der Nocken 122, 124 Druck ausüben, so daß der Rotor 58 entgegen Uhrzeigerrichtung an dem Nockenring 120 abläuft. Der Kolben 96 ist dagegen in seiner voll ausgefahrenen Stellung, d.h. die Rolle 112 befindet sich im Mittelpunkt eines Nockentales 124. Der Kolben 96 wird umgesteuert, d.h. die Druckluft aus dem Zylinder 66 wird abgelassen, so daß der Kolben 96 in den Zylinder geschoben wird und die Rolle 112 keinen Druck auf die Nockenflanke ausübt. Die Ausfuhr von Druckluft erfolgt ebenfalls in den Zylindern 68, 70 und 72, da die Rollen 14, 116, 118 der Kolben 98, 100, 102 auf Nockenflanken auflaufen und die Kolben in das Innere der Zylinder verschoben werden. Das von allen aktiven Kolben erzeugte Moment bewirkt einen Antrieb, der ausreicht, eine vollständige Drehung des Rotors 58 um 360° durchzuführen und in jeder Phase der Bewegung ein Drehmoment sicherzustellen, das ausreicht, einen Reifen während der Montage oder Demontage zu drehen. Die Kolben, die sich in der aktiven Phase befinden, d.h. deren Rollen unter Druck auf die in Drehrichtung des Rotors abfallenden Flanken der Nocken einwirken, werden über die Druckluftleitungen mit Druckluft versorgt, während Druckluft aus den anderen Zylindern abgeführt wird, wenn die Kolben radial nach innen verschoben werden.During the rotation of the pneumatic motor 50, each piston cylinder unit 60, 90 to 72, 102 with the corresponding line 106 to 118 is alternately connected to the air supply line 134 or the air outlet line 136 via the frontal supply device 132. From Fig. 5 it can be seen that the pistons 60, 62, 64 are supplied with compressed air and their rollers 106, 108, 110 exert pressure on the flanks of the cams 122, 124 so that the rotor 58 counterclockwise on the cam ring 120 expires. The piston 96, however, is in its fully extended position, i.e. the roller 112 is at the center of a cam valley 124. The piston 96 is reversed, i.e. the compressed air from the cylinder 66 is released so that the piston 96 is pushed into the cylinder and the roller 112 does not exert any pressure on the cam flank. Compressed air is also exported in cylinders 68, 70 and 72, since rollers 14, 116, 118 of pistons 98, 100, 102 run on cam flanks and the pistons are displaced into the interior of the cylinders. The torque generated by all active pistons provides a drive sufficient to perform a full 360 ° rotation of the rotor 58 and to provide sufficient torque in each phase of the movement to rotate a tire during assembly or disassembly. The pistons that are in the active phase, i.e. the rollers of which act under pressure on the flanks of the cams falling in the direction of rotation of the rotor are supplied with compressed air via the compressed air lines, while compressed air is discharged from the other cylinders when the pistons are moved radially inwards.

Fig. 16 zeigt eine Einrichtung 12 zum Aufspannen und Festlegen einer Radfelge. An einer Lagerplatte 200 sind vier Spreizarme 202, 204, 206 und 208 über Gelenke 210 gelagert. Jeder Spreizarm weist ein Zahnsegment 212 auf, das mit einem Gewinde 214 einer Schnecke 216 kämmt, die an der Abtriebswelle 126 des pneumatischen Motors 50 angeordnet ist. Die Zähne des Segmentes 212 des Spreizarms 202 sind um ein Viertel der Ganghöhe des Gewindes 214 der Schnecke 216 gegenüber den Zähnen des Spreizarmes 204 versetzt. Die Zähne des Segmentes des Spreizarmes 204 wiederum sind um eine Viertelganghöhe gegenüber den Zähnen des Segmentes an dem Spreizarm 206 und die wiederum um eine Viertelganghöhe des Gewindes 214 der Schnecke 216 gegenüber den Zähnen an dem Spreizarm 208 versetzt, wodurch gewährleistet ist, daß bei Rotation der Schnecke 216 jeder Spreizarm 202 bis 208 die gleiche Schwenkbewegung nach außen oder nach innen durchführt.16 shows a device 12 for clamping and fixing a wheel rim. There are four on a bearing plate 200 Spreading arms 202, 204, 206 and 208 mounted on joints 210. Each spreader arm has a toothed segment 212 which meshes with a thread 214 of a worm 216 which is arranged on the output shaft 126 of the pneumatic motor 50. The teeth of segment 212 of spreader arm 202 are offset from the teeth of spreader arm 204 by a quarter of the pitch of thread 214 of worm 216. The teeth of the segment of the spreader arm 204 are in turn offset by a quarter pitch compared to the teeth of the segment on the spreader arm 206 and which in turn are offset by a quarter pitch of the thread 214 of the worm 216 relative to the teeth on the spreader arm 208, which ensures that when rotating the Screw 216 each spreading arm 202 to 208 performs the same pivoting movement outwards or inwards.

Eine Kupplungsscheibe 218 weist an der Unterseite einen Reibbelag 221 auf, über welchen Reibschluß mit dem Gehäuse 51 des pneumatischen Motors 50 bewirkt wird. Die Kopplung der Kupplungsscheibe 218 mit dem Gehäuse 51 erfolgt pneumatisch. Die Kupplungsscheibe 218 ist in einem an dem Gehäuse 51 angeordneten Gehäusering 223 geführt.A clutch disc 218 has a friction lining 221 on the underside, via which frictional engagement with the housing 51 of the pneumatic motor 50 is effected. The coupling disc 218 is coupled pneumatically to the housing 51. The clutch disc 218 is guided in a housing ring 223 arranged on the housing 51.

An der Oberseite der Kupplungsscheibe 218 sind Schrauben 219 angebracht, die durch Bohrungen 225 in der Lagerplatte 200 geführt sind. Auf der Oberseite der Lagerplatte 200 stützen sich Tellerfedern 222 ab, die um die Schrauben 219 angeordnet sind. Über die Schrauben 219 wird die Lagerplatte 200 stationär festgehalten, wenn die Kupplungsscheibe 218 über Reibschluß mit dem Gehäuse 51 gekoppelt ist. In dieser Stellung der Lagerplatte 200 können die Spreizarme 202 bis 208 über die mit der Abtriebswelle 126 des pneumatischen Motors 50 angetriebene Schnecke 216 verschwenkt werden.Screws 219 are attached to the top of the clutch disc 218 and are guided through bores 225 in the bearing plate 200. Disc springs 222, which are arranged around the screws 219, are supported on the upper side of the bearing plate 200. The bearing plate 200 is held stationary via the screws 219 when the clutch disc 218 is coupled to the housing 51 by friction. In this position of the bearing plate 200, the spreading arms 202 to 208 can be pivoted via the worm 216 driven by the output shaft 126 of the pneumatic motor 50.

Wenn durch Verschwenken der Spreizarme 202 bis 208 eine Radfelge aufgespannt worden ist, wird der pneumatische Druck auf die Kupplungsscheibe 218 beendet, so daß diese sich unter der Wirkung der Federn 222 anhebt und mit Ihrer Oberseite, an der ein Reibbelag 227 angeordnet ist, in Anlage mit der Unterseite eines Ringes 217 gelangt, der an der Schnecke 216 angeformt ist. Über die Schrauben 225 wird die Lagerplatte 200 mitgenommen, wenn sich die Kupplungsscheibe 218 zusammen mit der Schnecke 216 dreht, während die Spreizarme 202 bis 208 ihre eingestellte Lage beibehalten. Damit wird eine über die Spreizarme eingespannte Radfelge gedreht und die Montage oder Demontage eines Reifens auf bzw. von einer Radfelge kann durchgeführt werden.If a wheel rim has been clamped by pivoting the spreading arms 202 to 208, the pneumatic pressure is applied to the Clutch disc 218 ends so that it rises under the action of the springs 222 and with its upper side, on which a friction lining 227 is arranged, comes into contact with the underside of a ring 217 which is integrally formed on the worm 216. The bearing plate 200 is carried by the screws 225 when the clutch disc 218 rotates together with the worm 216, while the spreading arms 202 to 208 maintain their set position. This rotates a wheel rim clamped over the spreading arms and the assembly or disassembly of a tire on or from a wheel rim can be carried out.

Wenn die Montage beendet ist, wird der pneumatische Motor 50 durch Versorgung sowohl der Druckluftzuleitung als auch Ableitung mit Druckluft abgestoppt und angehalten und durch erneute Kupplung der Kupplungsscheibe 218 mit dem Gehäuse 51 des Motors 50 und umgekehrte Versorgung des Druckluftmotors 50 wird eine Linksdrehung der Schnecke 216 bewirkt, was mit einem Zusammenschwenken der Spreizarme 202 bis 208 verbunden ist, die wiederum die eingespannte Radfelge freigeben.When assembly is complete, the pneumatic motor 50 is stopped and stopped by supplying both compressed air supply and discharge with compressed air, and by re-coupling the clutch disc 218 to the housing 51 of the motor 50 and reversely supplying the compressed air motor 50, the screw 216 turns to the left causes what is associated with a pivoting of the spreading arms 202 to 208, which in turn release the clamped wheel rim.

An der Oberseite der Spreizarme 202 bis 208 sind zusätzlich zu den elastischen Körpern 220 zum Einspannen einer Radfelge an der Felgenschüssel Einspannhaken 226 angeordnet, mittels welchen Radfelgen am Felgenhorn von außen ergriffen und durch Einschwenken der Spreizarme 202 bis 208 eingespannt werden können. Eine an der Oberseite der Einrichtung 12 angeordnete Auflageplatte 228 kann abgenommen werden, so daß auch Radfelgen mit vorstehendem Zentrierstutzen in der Einrichtung 12 festgelegt werden können.On the top of the spreading arms 202 to 208, in addition to the elastic bodies 220 for clamping a wheel rim on the rim bowl, clamping hooks 226 are arranged, by means of which wheel rims can be gripped on the rim flange from the outside and can be clamped in by pivoting the spreading arms 202 to 208. A support plate 228 arranged on the upper side of the device 12 can be removed, so that wheel rims with the above centering piece can also be fixed in the device 12.

Die Einrichtung 12 zum Festlegen der Radfelgen benötigt keine zusätzliche Krafteinheit wie Kolbenzylindereinheiten zum Betätigen von Spannbacken sondern wird über den pneumatischen Motor betätigt. Die Einrichtung 12 ist vorzugsweise gegenüber der Vertikalen geneigt angeordnet, so daß ein bequemes und ermüdungsfreies Arbeiten möglich ist.The device 12 for fixing the wheel rims does not require an additional power unit, such as piston-cylinder units, for actuating clamping jaws, but is instead operated via the pneumatic one Motor operated. The device 12 is preferably arranged inclined to the vertical, so that a comfortable and fatigue-free work is possible.

Fig. 17 und 18 zeigen eine Einrichtung 20 zum Abdrücken von Wulsträndern eines Reifens in das Bett einer Felge. Die Abdrückeinrichtung 20 weist zwei Arme 250 und 252 auf, die über Buchsen 254 bzw. 256 an einer senkrecht angeordneten Säule 258 gelagert sind. Die Säule 258 ist vorzugsweise im Querschnitt sechseckig ausgebildet, so daß keine Verdrehung der Arme 250 und 252 an der Säule 258 erfolgen kann. Zwischen den Armen 250 und 252 ist auf der Säule 258 eine Schraubenfeder 250 angeordnet, über welche die Arme auseinander gedrückt werden. Um die Arme 250 und 252 zueinanderhin ziehen zu können, ist ein Zylinder 262 an dem Arm 250 und ein Kolben 264 an dem Arm 252 angelenkt. Die Anlenkung der Kolbenzylindereinheit 262, 264 ist in kürzestem Abstand zu der Säule 258 vorgenommen, so daß während der Betätigung der Kolbenzylindereinheit 262, 264 keine Kippmomente auf die Buchsen 254, 256 auftreten. Der Zylinder 262 wird über eine Leitung 266 mit Druckluft versorgt, wodurch der Kolben 264 in den Zylinder 262 hinein geschoben und der Abstand der Arme 250, 252 verringert wird.17 and 18 show a device 20 for pressing bead edges of a tire into the bed of a rim. The push-off device 20 has two arms 250 and 252, which are mounted on a vertically arranged column 258 via bushings 254 and 256, respectively. The column 258 is preferably hexagonal in cross section so that the arms 250 and 252 on the column 258 cannot be rotated. Between the arms 250 and 252, a coil spring 250 is arranged on the column 258, by means of which the arms are pressed apart. In order to be able to pull the arms 250 and 252 towards each other, a cylinder 262 is articulated on the arm 250 and a piston 264 on the arm 252. The articulation of the piston cylinder unit 262, 264 is carried out at the shortest distance from the column 258, so that no tilting moments occur on the bushes 254, 256 during the actuation of the piston cylinder unit 262, 264. The cylinder 262 is supplied with compressed air via a line 266, whereby the piston 264 is pushed into the cylinder 262 and the distance between the arms 250, 252 is reduced.

An dem Arm 250 ist ein Schwhenkebel 268 und an dem Arm 252 ein Schwenkhebel 270 angelenkt. Am vorderen freien Ende des Schwenkhebels 268 ist eine konische Rolle 272 und am vorderen Ende des Schwenkhebels 270 eine konische Rolle 274 gelagert. Die Rollen 272 und 274 werden zum Abdrücken des Reifens von einer Radfelge in unmittelbarer Nähe des Felgenhorns auf die Flanken des Reifens aufgesetzt. Die erforderliche axiale Abdrückkraft wird über Kolbenzylindereinheiten 276 bzw. 278, die an den Armen 250 bzw. 252 befestigt sind, auf die Schwenkhebel 268, 270 aufgebracht. Die erforderliche Druckluft wird über Leitungen 280 bzw. 282 in die Kolbenzylindereinheiten 276, 278 zugeführt. Eine Rückstellung der Schwenkhebel 268, 270 in ihre Ausgangslage nach einem Abdrückvorgang, wenn die Kolbenzylindereinheiten 276, 278 eingefahren sind, erfolgt über Zugfedern 284 bzw. 286. Die Kolbenzylindereinheiten 276 und 278 können unterschiedliche Wege und damit unterschiedliche Verschwenkungswinkel der Hebel 268, 270 durchführen, wodurch eine Anpassung an unterschiedlich breite Felgenschultern erfolgen kann. Anschläge 288 und 290 begrenzen die maximalen Schwenkwege der Schwenkhebel 268 bzw. 270.A swivel lever 268 is articulated on the arm 250 and a swivel lever 270 is articulated on the arm 252. A conical roller 272 is mounted on the front free end of the pivot lever 268 and a conical roller 274 is mounted on the front end of the pivot lever 270. The rollers 272 and 274 are placed on the flanks of the tire in order to press the tire off a wheel rim in the immediate vicinity of the rim flange. The required axial push-off force is applied to the pivot levers 268, 270 via piston cylinder units 276 and 278, which are fastened to the arms 250 and 252, respectively upset. The required compressed air is fed into the piston cylinder units 276, 278 via lines 280 and 282, respectively. The swivel levers 268, 270 are returned to their starting position after a push-off operation when the piston-cylinder units 276, 278 are retracted via tension springs 284 and 286, respectively. The piston-cylinder units 276 and 278 can carry out different paths and thus different pivoting angles of the levers 268, 270. which allows adaptation to rim shoulder widths of different widths. Stops 288 and 290 limit the maximum swivel paths of the swivel levers 268 and 270, respectively.

Wie aus Fig. 18 zu ersehen ist, kann die Einrichtung zum Abdrücken eines Reifens von einer Radfelge mit der Säule 258 um einen Winkel β verschwenkt werden, so daß zum einen ein unbehindertes Auflegen eines zu montierenden Reifens erfolgen kann und zum anderen unterschiedliche Reifendurchmesser berücksichtigt werden können.As can be seen from FIG. 18, the device for pressing a tire off a wheel rim with the column 258 can be pivoted through an angle β, so that on the one hand an unimpeded fitting of a tire to be fitted can take place and on the other hand different tire diameters are taken into account can.

Die Arme 250 und 252 gleiten mit ihren Buchsen 254, 256 in vertikaler Richtung auf der Säule 258 betätigt über die Kolbenzylindereinheit 262, 264, um an die Breite des abzudrückenden Reifens eingestellt zu werden. Durch Verschwenken mit der Säule 258 wird gleichzeitig der Durchmesser berücksichtigt. Nach Annäherung an die Reifenflanken über die Kolbenzylindereinheit 262, 264 sitzen die konischen Rollen 272, 274 auf den Reifenflanken auf. Während der aufgespannte Reifen über den pneumatischen Motor in Rotation versetzt wird, wird Druck auf die Kolbenzylindereinheiten 276, 278 ausgeübt, wodurch das Abdrücken der Wulstränder von den Felgenschultern in das Felgenbett eingeleitet wird. Durch die Drehung des Reifens kann die erforderliche Kraft zum Abdrücken der Wulstränder stark verringert werden. Durch das Aufbringen des Abdrückdruckes auf die Rollen 272, 24 wird ein Moment erzeugt, das die Arme 250, 252 und damit die Buchsen 254, 256 in geringen Grenzen verschwenkt, wodurch eine Blockierung der Buchsen 254, 256 an der Säule 258 erreicht wird und die Arme auf der Säule blockiert sind. Wenn der Reifen abgedrückt ist, werden die Kolben der Kolbenzylindereinheiten 276, 278 eingefahren, wodurch die Arretierung der Buchsen 254, 256 an der Säule 258 aufgehoben wird und die Arme über die Kraft der Feder 260 auseinander gefahren werden, so daß die Einheit 20 nach außen geschwenkt werden und durch Einsatz der Abzieheinrichtung 18 der Reifen von der felge abgenommen werden kann.The arms 250 and 252 slide with their bushings 254, 256 in the vertical direction on the column 258, actuated via the piston-cylinder unit 262, 264, in order to be adjusted to the width of the tire to be pushed off. By pivoting with the column 258, the diameter is taken into account at the same time. After approaching the tire flanks via the piston cylinder unit 262, 264, the conical rollers 272, 274 are seated on the tire flanks. As the clamped tire is rotated by the pneumatic motor, pressure is exerted on the piston cylinder units 276, 278, whereby the bead edges are pressed off the rim shoulders into the rim well. By turning the tire, the force required to push the bead edges can be greatly reduced. By applying the impression pressure to the rollers 272, 24 generates a moment that swivels the arms 250, 252 and thus the bushes 254, 256 within slight limits, as a result of which the bushes 254, 256 are blocked on the column 258 and the arms on the column are blocked. When the tire is depressed, the pistons of the piston cylinder units 276, 278 are retracted, releasing the locking of the bushings 254, 256 on the column 258 and spreading the arms apart by the force of the spring 260 so that the unit 20 is outwardly can be pivoted and the tire can be removed from the rim by using the pulling device 18.

Claims (11)

  1. Apparatus for mounting a tyre on and/or removing it from a wheel rim, comprising
    - a stationary plinth-like frame (22),
    - a device (12) mounted on the front of the frame (22) for immobilising a wheel rim, this device having a column (126, 228) rotatably mounted in the frame (22) and provided with an upper support plate (228) and with locking means (202 to 208) for fixing the rim, and this device further having a motor (14, 50) mounted in the plinth-like frame (22) as a rotary drive for the column (126, 228),
    - a device (20) for pushing off the beaded edges of a supported pneumatic tyre into the rim well, this device comprising an upright (26) which is mounted on the rear of the plinth-like frame (22) and which has two pivoted levers (268, 270), which are pivoted on the upright (26) in such a way as to be adjustable relative to one another by means of a motor and which bear on their free ends respective rollers (272, 274) acting simultaneously on both beads, and
    - a device (18) for pulling the pushed-off beaded edges over the rim horn, this device having an element (32) to bear on the rim horn,
       characterised in that
       the locking elements for the wheel rim are formed by a plurality of self-centring spreader arms (202 to 208) which by means of their lower end portions are pivoted on a base plate (200) so as to be pivotable about horizontal axes (210), and
       the drive motor (50) forming the rotary drive for the column (126, 228) and for the support plate (228) is a reversible pneumatic motor (50) with a rotor (58) and stator (52) and with radially disposed piston-cylinder units (60, 90; 62, 92; 64, 94; 66, 96; 68, 98; 70, 100; 72, 102) and cams (122, 124) arranged on a circle, the motor (50) being operatively connected to the spreader arms (202 to 208) by a friction clutch (218, 221, 227) and transmission (212, 214) for joint pivoting of the spreader arms (202 to 208).
  2. Apparatus as claimed in claim 1, characterised in that the transmission (212, 214) comprises a worm (216) mounted on the drive shaft (126) for the pneumatic motor (50), the base plate (200) on which the spreader arms (202 to 208) are pivoted can be coupled either to the output shaft (126) or to the motor housing (51), and the worm (216) meshes with toothed segments (212) on the pivoted ends of the spreader arms (202 to 208).
  3. Apparatus as claimed in claim 1 or 2, characterised in that four spreader arms (202 to 208) arranged In diametrically opposite pairs are pivoted on the base plate (200).
  4. Apparatus as claimed in claim 2 or 3, characterised in that around the output shaft (126) of the motor (50) there is arranged a clutch plate (218) which can be coupled by way of a lower friction lining (221) to the motor housing (51) or by way of an upper friction lining (227) to the output shaft (126), and which has on its top screws (219) which are slidably guided in passages (225) in the base plate (200).
  5. Apparatus as claimed in claim 4, characterised in that springs (222) acting on the base plate (200) are mounted on the screws (219), and a ring (217) is moulded on the worm (216) and forms a bearing surface for the clutch plate (218).
  6. Apparatus as claimed in any of claims 2 to 5, characterized in that the sets of teeth (212) on the segments are respectively offset relative to one another by one-quarter of the pitch of the worm (216).
  7. Apparatus as claimed in any of claims 2 to 6, characterised in that the operation of the clutch plate (218) to couple the base plate (200) to the motor housing (51) is performed pneumatically.
  8. Apparatus as claimed in any of claims 1 to 7, characterised in that rubber elements (220) and clamping claws (226) are mounted on the free ends of the spreader arms (202 to 208).
  9. Apparatus as claimed in any of claims 1 to 8, characterized in that the centre axis of the device (12) for immobilising the wheel rim is inclined forwards at an acute angle to the vertical.
  10. Apparatus as claimed in any of claims 1 to 9, characterised in that on the upright (26) of the device (20) for pushing off the beaded edges two arms (250, 252) are mounted so as to be rotatable about the vertical axis of the upright, and piston-cylinder units (276, 278) acting on the pivoted levers (268, 270) are mounted on the arms (250, 252).
  11. Apparatus as claimed in any of claims 1 to 10, characterised in that the device (18) for pulling the pushed-off beaded edges over the rim horn comprises an articulated arm (28, 30) which is pivoted on the upright (26), and on whose free end the element to bear on the rim horn is secured, which element is in the form of a synthetic plastics element (32) shaped to grip behind the beaded edge.
EP89900606A 1988-01-14 1988-12-22 Apparatus for mounting tyres Expired - Lifetime EP0358729B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89900606T ATE82552T1 (en) 1988-01-14 1988-12-22 TIRE MOUNTING DEVICE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8800372U 1988-01-14
DE8800372U DE8800372U1 (en) 1988-01-14 1988-01-14 Tire changer

Publications (2)

Publication Number Publication Date
EP0358729A1 EP0358729A1 (en) 1990-03-21
EP0358729B1 true EP0358729B1 (en) 1992-11-19

Family

ID=6819541

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89900606A Expired - Lifetime EP0358729B1 (en) 1988-01-14 1988-12-22 Apparatus for mounting tyres

Country Status (7)

Country Link
US (1) US4986328A (en)
EP (1) EP0358729B1 (en)
JP (1) JPH0647324B2 (en)
AT (1) ATE82552T1 (en)
AU (1) AU2824789A (en)
DE (2) DE8800372U1 (en)
WO (1) WO1989006604A1 (en)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4028080C2 (en) * 1990-09-05 2000-09-21 Hofmann Maschinen Und Anlagenbau Gmbh Device for mounting motor vehicle tires on rims of disc wheels
US5226465A (en) * 1991-02-19 1993-07-13 Stahlgruber Otto Gruber Gmbh & Co. Mounting device for motor vehicle tires
DE59200110D1 (en) * 1991-02-19 1994-05-19 Stahlgruber Gruber & Co Otto Removal device for automotive pneumatic tires.
DE4202803C1 (en) * 1992-01-31 1993-07-15 Hofmann Werkstatt-Technik Gmbh, 6102 Pfungstadt, De Method of removing tyres from wheel rims - has arms squeezing beam into wheel well controlled using arm force, arm position and wheel torque sensors
DE9308945U1 (en) * 1993-06-16 1993-10-21 Warkotsch, Horst, 30938 Burgwedel Device for removing a tire from a rim
IT1304273B1 (en) * 1998-04-02 2001-03-13 Corghi Spa TIRE CHANGER MACHINE AND RELATED ACCESSORIES.
US6056034A (en) * 1998-05-20 2000-05-02 Matnick; Michael Difficult to mount tire changer and method for handling thereof
US6182736B1 (en) 1998-06-15 2001-02-06 Hennessy Industries, Inc. Helper arm for a rim holding tire changer
IT1310170B1 (en) * 1999-02-04 2002-02-11 Giuliano Srl MACHINE FOR THE ASSEMBLY AND DISASSEMBLY OF SPECIAL TYPE TIRES
US6247516B1 (en) 2000-04-18 2001-06-19 Rick Sinclair Tire changing apparatus and method
DE10116469B4 (en) * 2001-04-03 2006-08-03 Hofmann Maschinen- Und Anlagenbau Gmbh A method for mounting a motor vehicle tire on a rim of a disc wheel
US7621311B2 (en) * 2005-10-05 2009-11-24 Android Industries Llc Tire-wheel assembly adjuster
ITMC20060115A1 (en) * 2006-09-11 2008-03-12 Societa Italiana Costruzioni Elettromeccaniche IMPROVED DEVICE FOR TIRE DISMANTLING MACHINES, FACILITATING THE ASSEMBLY OF THE TIRE WITHOUT EXCESSIVE IRONING.
US20080156447A1 (en) * 2006-12-28 2008-07-03 Android Industries Llc Tire and Wheel Mounting System and Method
WO2010078438A2 (en) 2008-12-31 2010-07-08 Android Industries Llc System and method for mounting a tire and a wheel

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3086578A (en) * 1960-07-28 1963-04-23 Fmc Corp Tire changing apparatus
US3815653A (en) * 1972-09-11 1974-06-11 Coats Co Inc Tire changing apparatus
US4047553A (en) * 1974-05-02 1977-09-13 Wayne Kotila Tire changing device
BE860385A (en) * 1977-11-03 1978-03-01 Quesne Francis Du DEVICE FOR TIGHTENING A MOTORCYCLE WHEEL WHICH NEEDS TO REMOVE A TIRE OR ON WHICH A TIRE MUST BE MOUNTED
DE3401476A1 (en) * 1984-01-18 1985-07-25 Gebr. Hofmann Gmbh & Co Kg Maschinenfabrik, 6100 Darmstadt MOUNTING DEVICE FOR TIRES
FR2588616B1 (en) * 1985-10-16 1988-01-08 Poclain Hydraulics Sa MECHANISM, PUMP MOTOR, HAVING AT LEAST TWO SEPARATE ACTIVE CYLINDERS.

Also Published As

Publication number Publication date
DE3876096D1 (en) 1992-12-24
AU2824789A (en) 1989-08-11
ATE82552T1 (en) 1992-12-15
EP0358729A1 (en) 1990-03-21
JPH02500101A (en) 1990-01-18
DE8800372U1 (en) 1988-03-24
JPH0647324B2 (en) 1994-06-22
WO1989006604A1 (en) 1989-07-27
US4986328A (en) 1991-01-22

Similar Documents

Publication Publication Date Title
EP0358729B1 (en) Apparatus for mounting tyres
EP0499825B1 (en) Dismantling device for vehicle tires
DE60129375T3 (en) Reifenabdrückvorrichtung for a Raddemontiergerät, and Raddemontiergerät with such a device
DE102007057484B3 (en) tire changer
DE2213779C3 (en) Device for removing and assembling tires on rims
EP0177886B1 (en) Flexographic printing machine with several printing units and forme cylinders
EP3648986B1 (en) Emergency wheel with mounting element
WO2019008113A1 (en) Self-bracing emergency wheel
DE19934791C1 (en) Equipment raising tire sidewalls of partially-expanded tire on construction drum comprises lockable roller arms pivoting between rest and working positions
DE602004006474T2 (en) Tire pushing device for a wheel demounting device
EP1439054A2 (en) Apparatus for turning up the sidewalls of a tyre on a tyre building drum.
DE602004000769T4 (en) Maneuvering device for non-powered vehicles
DE3614738A1 (en) Method and device for fitting or removing a solid tyre or a pneumatic tyre
DE2751036A1 (en) PRESS FOR TIRE VULCANIZATION FORMS
DE3918484A1 (en) TIRE LOADING MECHANISM OF A TIRE COOLER IN A TIRE VOLCANIZING MACHINE
DE102011052953B4 (en) Device for mounting or dismounting a wheel tire of a rail vehicle
EP0508113B1 (en) Device for the rapid precise clamping and tensioning of printing plates on the forme cylinder of a printing press
DE19537180C1 (en) Device for dismantling and assembling rubber-sprung wheel sets of rail vehicles
EP0243785A2 (en) Method and device for mounting or removing a solid or pneumatic tyre
DE3727817C2 (en)
DE2535734A1 (en) Large tyre fitting rig - ITH RAMS TO LIFT AND TILT WHEEL AND ECCENTRIC CAM TOOLS (NL50177)
DE9308945U1 (en) Device for removing a tire from a rim
DE3873467T2 (en) DEVICE FOR ASSEMBLING AND DISASSEMBLING TIRES.
DE2003524B2 (en) Spoked wheel assembly machine - has rim held rigidly by frame whilst spokes tensioned to preset torque by radial tool
DE2104957A1 (en) Tire changer

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19891102

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT CH DE FR GB LI

17Q First examination report despatched

Effective date: 19910531

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT CH DE FR GB LI

REF Corresponds to:

Ref document number: 82552

Country of ref document: AT

Date of ref document: 19921215

Kind code of ref document: T

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
REF Corresponds to:

Ref document number: 3876096

Country of ref document: DE

Date of ref document: 19921224

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 20061109

Year of fee payment: 19

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 20061205

Year of fee payment: 19

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20061211

Year of fee payment: 19

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20071231

Year of fee payment: 20

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20071222

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20071222

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20071231

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20071231

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20061005

Year of fee payment: 19

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20081020

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20071222

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20071231